There are still many old coins that have survived until now including ethereum, this is also the second best coin after bitcoin so you can choose old coins in the top coins, but if you like new projects that show good development and popularity, you should do research first because their reputation is not yet proven like old coins.
Indeed. We have many old coins that can develop and last a long time. ETH, BNB, XRP, TRX, XLM, and ADA are old coins but they still can develop and survive until now. These are surely top coins, they can be among the top coins for many years. It is proven that many people believe in these coins because the market caps keep increasing. If we are not confident with new coins, these old and top coins are the best options for our investment. For a long time holding, I think we don't need to doubt them because they are proven enough. However, we still need to analyze the current progress and news about these coins.